Mounting for blackboards and the like



Dec. 5, 1939. c. D. LOWRY MOUNTING FOR BLACKBOARDS AND THE LIKE Filed July 11, 1938 3nvntor CLYDE 0. Low/ex.

Gttorneg Patented Dec. 5, 1939 PATENT OFFICE MOUNTING FOR BLACKBOARDS AND THE LIKE Clyde D. Lowry, Toledo, Ohio, assignor to Libbey- Owens-Ford Glass Company, Toledo, Ohio, a

corporation of Ohio Application July 11, 1938, Serial "No. 218,557

6 Claims.

The present invention relates to an improved mounting for blackboarcls and the like.

An important object of the invention is the provision of a novelmetal frame mounting for blackboards constructed to removably clamp and support the same in position upon a supporting wall.

Another object of the invention is the provision of such a metal frame mounting which will insure holding the blackboard firmly in proper position, without danger of cracking the same.

Another object of the invention is the provision of such a metal frame mounting constructed to support blackboards of different thicknesses and including means for varying the amount of clamping pressure exerted upon the blackboard.

A further object of the invention is the provision of such a metal frame mounting primarily adapted for supporting blackboards formed of glass, although it may be used with equal facility and effectiveness for the supporting of blackboards of other materials such as slate and the like.

Other objects and advantages of the invention will become more apparent during the course of the following description, when taken in connection with the accompanying drawing.

In the drawing, wherein like numerals are employed to designate like parts throughout the same:

Fig. l. is a front elevation of a blackboard mounting provided by the present invention; and

Fig. 2 is a vertical section therethrough taken substantially on line 2-2 of Fig. 1.

With reference to,the drawing, 5 refers to a portion of a supporting wall of any desired construction upon which the blackboard, designated in its entirety by the numeral 6, is mounted by means of the improved metal frame mounting provided by the present invention and indicated generally at I.

The blackboard 6 preferably consists of one or more sheets of glass, although it can be made of slate or any other suitable material. When glass sheets are used, however, they can be either of opaque glass or transparent glass provided upon the rear surface thereof with a desired opaque backing. Any color glass may be used but the two colors most generally preferred are black and green. While the blackboard may consist of but a single sheet, it is shown in the drawing, by way of example, as being made up of four sheets or plates of glass 8, 9, I0 and H, the sheets 8 and 9 being disposed opposite one another, while the sheets l0 and i I are arranged above sheets 8 and 9 respectively. The inner adjacent horizontal and vertical edges of the glass sheets can be joined together by the horizontal and vertical division members I2 and I3 respectively or in any other suitable manner.

The blackboard 6 is shown as being substan- '5 tially rectangular and the metal frame mounting l is of a corresponding shape comprising a bottom section M, top section l5, and vertical side sections It and I7, said sections being mitered at their adjacent ends as indicated at E8. Each of the frame sections M to I? includes generally a fixed rear member, a movable front member, and means for removably clamping the blackboard between the saidifixed and movable members upon I the supporting wall 5. Referring particularly to the bottom section M, the fixed rear member thereof comprises a vertical back wall 19 secured to thesupporting wall 5 by screws or the like 20, said-back Wall being provided at its upper end with a longitudinally extending :20 'beadZl engaging the inner face of .the blackboard -fi. Formed integral with the back wall I9 is a forwardly directed horizontal shelf 22 provided upon its upper surface with a longitudinally extending rib Z3. Carried upon the shelf 22 is a 125 setting block -24,-said'blockbeing of inverted chan nel shape and fitting over the rib 23 which prevents it from slipping forwardly. The upper surface of the setting block 24 can be covered with a pad 25 of rubber, felt, or the like, to support the .30 lower edge of the blackboard. Any desired number of setting blocks 24 may of course be used. The back wall 19 projects downwardly beyond the shelf 22 as indicated-at-ZB and through which may pass additional fastening screws 21. Also formed integral with the back wall i9 beneath shelf 22 is the forwardly directed, substantially horizontal chalk and eraser receiving trough 23, the'bottom of which is preferably corrugated to provide longitudinally extending grooves for receiving "the chalk. The inner end portion '29 of trough 28 is preferably flat as shown and cooperates with the shelf 22 'to provide a forwardly facing horizontal channel 30 for receiving therein the lowerinturned end 3| of the movable front member or face piece 32. The front member 32 is of the desired contour and is formd at its upper end with a bead 33 engaging the outer face of the blackboard. The front member is removably held in place, in clamping relation with the blackboard, by screws 34 which pass through openings in said front member and also through openings in the back wall [9 of the rear member; being threaded at their inner ends in the supporting wall 5. By properly adjusting the fastening screws 34, the desired clamping pressure can be exerted upon the blackboard to hold it firmly in place, without danger of cracking the same.

The top section [5 and side sections [6 and I! of the frame mounting I each comprises a fixed rear member 35 secured to the supporting wall 5 by screws or the 1ike35 and a movable front member 31 removably associated with the rear member 35 and secured in clamping relation with "I the blackboard by fastening screws 38. The front and rear members ofthe top and side sections are of substantially the same construction and associated with one another in substantially the same manner as the front and rear members of the bottom section M, the principal differences being that the said top and side sections are not provided with the back wall extension 26 nor with the chalk and eraser receiving trough 28. Arranged behind the blackboard 6 are bat-' tens or the like 39, preferably of water-proofed pressed or plywood, which form a backing for the said blackboard.

It is to be understood that the form of the invention herewith shown and described is to be taken as the preferred embodiment of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

I claim:

1. In a metal frame mounting for blackboards and the like, top and bottom sections, each comprising a fixed rear member engaging the inner face of the blackboard and a movable front member engaging the outer face of said blackboard, said rear member being provided beyond the edge of the blackboard with a forwardly facing channel and said front member being provided with a rearwardly directed portion slidably received within said channel, and means for removably clamping the said blackboard between the said fixed and movable members.

2. In a metal frame mounting for blackboards and the like, top and bottom sections, each comprising a fixed rear member engaging the inner face of the blackboard and a movable front member engaging the outer face of said blackboard, said rear member being provided beyond the edge of the blackboard with a forwardly facing channel and said front member being provided with a rearwardly directed portion slidably received within said channel, means for removably clamping the said blackboard between the said fixed and movable members, and a forwardly directed chalk and eraser receiving trough carried by the fixed member of the bottom section.

3. In a metal frame mounting for blackboards and the like, top and bottom sections, each comprising a fixed rear member engaging the inner face of the blackboard and a movable frontmember engaging the outer face of said blackboard, means for removably clamping the blackboard between said fixed and movable members, a forwardly directed horizontal shelf carried by the rear member of said bottom section and provided upon its upper surface with a longitudinally extending rib, and a setting block carried upon said shell and fitting over said rib for supporting the blackboard at its lower edge.

4. In a metal frame mounting for blackboards and the like, top and bottom sections, each comprising a fixed rear member engaging the inner face of the blackboard and a movable front member engaging the outer face of said blackboard, means for removably clamping the blackobard between said fixed and movable members, a forwardly directed horizontal shelf carried by the rear member of said bottom section and provided upon its upper surface with a longitudinally extending rib, a setting block carried upon said shelf and fitting over said rib for supporting the blackboard at its lower edge, and

a forwardly directed chalk and eraser receiving trough also carried by the fixed member of the bottom section.

5. In a metal frame mounting for blackboards and the like, top and bottom sections, each comprising a fixed rear member engaging the inner face of the blackboard and a movable front member engaging the outer face of said blackboard, said rear member being provided beyond the edge of the blackboard with a forwardly facing 3 channel and said frontmember being provided with a rearW-ardly directed portion slidably received within said channel, means for removably clamping the said blackboard between the said fixed and movable members, a forwardly directed horizontal shelf carried by the rear member of said bottom section and provided upon its upper surface with a longitudinally extending rib, and a setting block carried upon said shelf and fitting over said rib for supporting the blackboard at its lower edge.

6. In a metal frame mounting for blackboards and the like, top and bottom sections, each comprising a fixed rear member engaging the inner face of the blackboard and a movable front member engaging the outer face of said blackboard, means for removably clamping the blackboard between said fixed and movable members, a forwardly directed horizontal shelf carried by the rear member of said bottom section and provided upon its upper surface with a longitudinally extending rib, a setting block carried upon said shelf and fitting over said rib for supporting the blackboard at its lower edge, and a forwardly directed chalk and eraser receiving trough also carried by the fixed member of the bottom section beneath the said shelf and cooperating therewith to form a forwardly facing channel beyond the edge of the blackboard, the front member of the said bottom section being provided with a rearwardly directed lower portion slidably received within the said channel.

CLYDE D. LOWRY. 

